Automatic pressing machine



e. HOFF. AUTOMATIC PRESSING MACHINE.

APPLICATION FILED NOV. 17. 1917.

Patented Sept. 23, 1919.

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G. HOFF. AUTOMATIC PBES SING MACHINE.

APPLICATION FILED NOV. l7. l9l7.

Patented Sept. 23, 1919.

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GUSTAV HOFIE, 0F AMOT, SWEDE'N.

AUTOMATIC PRESSING-MACHINE.

Specification of Letters Patent. Patented Sept. 23, 19 19.

Application filed November 17, 1917. Serial No. 202K514.

To all whom it may concern.

Be it known that I, GUSTAV Horn, a subject of the King of Norway, residing at Amot, in the Kingdom of Sweden, have invented certain new and useful Improvements pressing machines of the kind comprising a number of pressing pistons performing successlve operations on the blank and provided with holding devices mounted on a common movable frame and acting to move the blanks fronr all pressing devices one step farther in the cycle of operation.

The invention has for its object an arrangement in machines of this kind, by means of which the blank is turned a cer tain angle during each transferring movement in order that each new press should act on the blank from a new side.

This object is obtained by mounting the several transferring holders rotatably in their movable frame and keeping the same in engagement with a common driving mechanism which rotates the holders a certain angle by each movement of the frame.

The invention will hereinafter be more particularly described in connection with a machine for producing the nickel steel caps or jackets of rifle bullets or the like. It is well known that bullet jackets and various other articles have to be acted upon in a number of successive operations, each oper ation somewhat changing the form of the article until it finally receives the desired shape. Obviously it may be necessary to submit different ends of a bullet blank to the action of a die punch and this is sometimes also necessary in connection with other similar articles. If desired the shape of the die may be particularly adapted to the end of the blank inserted thereinto.

In the accompanying drawings, illustrating a preferred embodiment of the invention as applied to an automatic press for rifle bullets,

Figure 1 illustrates a cross-section on line l1 of Fig. 2, and

Fig. 2 illustrates a section through one of the dies of Fig. 1.

Referring to both figures of the drawings, 1 are the several pressing devices and 2 are the grooved holders transferring the blank from die to die.

Said holders 2 are rotatably mounted in a frame 3 each end of which is journaled on crank pins 4 carried by toothed wheels 5 at predetermined distance from the axes of said wheels. Said toothed wheels 5 are oscillated by means of a reciprocating ra'ck 6, whereby the frame .3 performs an oscillating movement as indicated by the dotted arcs 7 between the centers of the device 1, the radius of said arcs being, of course, equal to the distance between the axis of wheel 5 and the pin carried thereby.

The holders 2 are provided on their axes with pinions 8 engaging a stationary rack 9 with vertical teeth of suflicient height to keep them always in engagement with pinions 8 during the oscillations of the frame 3.

The blank is first placed in the holder farthest to the right, which has no pinion and is not rotatable. By this holder the blank is carried to the first die 1 and is forced into said die by means of the piston 10, (Fig. 2) reciprocated by the frame 11, through the blank holding slot in holder 2. After being worked upon there the blank is forced out of the die, by means of pusher rod 12, into the slot of the next holder 2, and is carried thereby to the next die at the same time being rotated 180 by gearing 8, 9, so that it is placed in this die with the oppdsite end in front.

In the same manner the process continues until all operations are finished.

The reciprocating frame 11 and the lever and rod mechanism 13 and 14 for pusher rod 12 are not shown provided with actuating mechanism, but this may be of any known and desirable type, such as crank wheels, cams or the like.

It is evident that pinions 8 of different diameter may be used in order to rotate the holders different angles as may be required.

Claims.

1. In automatic pressing machines a number of pressing devices performin successive operations on a blank, holders ..or trans ferring the blank from. each die to the neXt one, said" blank holders being rotatably mounted in a common movable frame and means for rotating the blank holders a certain angle during the transferring movement.

2. In automatic pressing machines a number of pressing devicesperforming successive operations on a blank, holdersfor transferring the blank from each die to the next one, said blank holders. being rotatably mounted in acommon movable frame, pinions connected to the rotatable blank holders and a stationary toothed rack in engagement with said pinions in order to rotate the holders a certain angle during the transferring movement.

In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing Witnesses.

GUSTAV HOFF.

Witnesses:

C. VARMAN, V 3. FABRroIUs HANSEN.

Copies of tlfli atent may be obtained for fife cents each, by addressing the Commissioner of Patents. Washington, 1). 0.?" 

